LAB SEVEN: Cell Transport Mechanisms and Permeability This week, we are studying cell membrane transport. In addition to the items listed in the iLab tab, your “summary” assignment is to answer the following questions after completing the first lab. This is due by_______. Submit your assignment to the Dropbox located on the silver tab at the top of the course page. 1.
LAB SEVEN: Cell Transport Mechanisms and Permeability This week, we are studying cell membrane transport. In addition to the items listed in the iLab tab, your “summary” assignment is to answer the following questions after completing the first lab. This is due by_______. Submit your assignment to the Dropbox located on the silver tab at the top of the course page. 1.
What is the concentration of glucose in ppm in a 0.00025 M glucose solution? The density of this solution is 1.02 g/ml. [pic] [pic] [pic] [pic] 5. Draw reaction diagrams for endothermic and exothermic reactions. Label each axis, reactants, products, heat of reaction (ΔH), and energy of activation (Ea).
4. Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea. NaCl, Urea, Glucose, Albumin. Activity 2 Simulated Facilitated Diffusion 1. Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it differs.
False Glucose is one of the major electrolytes in plasma. False Both body water and sodium are lost during excessive sweating. True Facilitated diffusion requires a membrane carrier protein and cellular energy. False Ribosomes consist of three subunits of equal size. False An isotonic solution for human red blood cells is a D. 0.9% saline solution.
Or the amount of ___________________________________ particles of the substance weighs. 1 mole hydrogen = _____________ g = _______________________ atoms 1 mole sodium = _____________ g = _____________________ atoms 1 mole chlorine = _____________ g = ____________________ atoms 1 mole sodium chloride = ________________ g = ____________________________ formula units 1 mole glucose = __________________g = ____________________________ molecules Example Problem 1. A can of artificially sweetened soft drink may contain 70.0 mg of aspartame, or NutraSweet@, C14H18N2O5. (a)Calculate the number of moles of aspartame in the soft drink. (b) Calculate the number of molecules of aspartame in the soft drink and the number of atoms of carbon.
2. Which of the following occurs when a hypertonic solution is added to cells? You correctly answered: d. The cells shrink. 3. The variable that affects osmotic pressure is You correctly answered: a. the concentration of nondiffusing solutes.
Explain why polarized is a good term to describe a membrane with a resting potential. b. Where, exactly, do the opposing charges exist? What is the charge of the cytosol and the extracellular fluid? c. What is the typical resting potential for
D) The active transport of a substance out of a cell to maintain equilibrium. E) The movement of solute molecules from a lower to a higher concentration across a semipermeable membrane. Answer: B, osmosis is specifically the movement of solvent, not a solute or a general substance described in
Science Fair Project Control Measure the viscosity of plain water using the method listed above. 10. Science Fair Project Experimental Groups The amount of sugar in the water would vary from 20, 40, 60, 80, and 100 grams of sugar. Research Viscosity can be defined as the measurement of a liquid's resistance to flow. Consider water and molasses.